FST’s Laboratory Animal Microtattoo System is a quick, efficient and affordable method of permanently identifying laboratory animals (particularly mice as early as 1 day old). Designed and tested by laboratory animal technicians, the system utilizes a hypodermic needle at one end of a stainless steel forceps and a small metal cup containing green tattoo paste at the other side of the forceps. By squeezing the forcep together, the needle penetrates the toe or footpad or ear of the animal and injects a deposit of green tattoo paste in the animal. A grid location pattern provided enables a numbering system that extends over 1 million. Use of the Microtattoo system is humane and in compliance with regulatory agencies for the care and use of laboratory animals. Both the microtattoo forceps and green tattoo paste can be autoclaved. Kit includes: 1 pair plated steel microtattoo forceps, 1 oz of green tattoo paste, 1 aluminium planchette, 2 hypodermic needles, and 1 plastic holding case.